A thunderous unfinished partnership of 73 off just 29 balls for the sixth wicket between skipper Mahendra Singh Dhoni (51 not out) and Dwayne Bravo (33 not out) carried the Super Kings to 187 for five after being put into bat and losing two early wickets.
In reply, the Mumbai Indians, who had beaten the Super Kings in both the previous two meetings this season, faltered after the run out of Sachin Tendulkar (11), followed by the dismissal of in-form opener Dwayne Smith(38) and were pegged to 149 for nine with seamers Bravo (2 for 10) and Albie Morkel (2 for 31) delivering body blows.
While the Mumbai Indians were eliminated from the competition, the Super Kings take on Delhi Daredevils in Chennai Friday for the right to face the Kolkata Knight Riders in Sunday's final, also at the MA Chidambaram Stadium.
Image: Chennai Super Kings' captain Mahendra Singh Dhoni plays a shot during their Indian Premier League (IPL) playoff cricket match against Mumbai Indians' in Bangalore, India, Wednesday, May 23, 2012.
Scorecard | IPL 2012